双管正激电路数字控制系统设计方法的分析与对比

主要针对双管正激电路进行数字化控制。首先,分别采用s域间接设计、ω域波特图设计和z域根轨迹设计3种方法对数字控制系统进行设计;然后,对这3种设计方法进行了详细的分析和对比,并且用Matlab仿真验证了设计方法的正确性;最后,给出了3种数字控制系统设计的总结和对比,对指导数字控制系统的设计有着积极的意义。     

ONSA：传感网中基于优化非均匀统计特性的源匿名协议

针对无线传感网中分级信源位置隐私保护协议的特点,对不同尺寸簇及虚假信息注入统计特性在隐私性、延时和网络负载等方面进行了分析,在此基础上提出了基于优化非均匀统计特性的源匿名协议(ONSA),以优化非均匀分簇策略及相应符合非均匀统计特性的分级优化虚假信息注入方式来高效地保护信源节点位置隐私。仿真实验结果表明,与现有方法相比,ONSA能有效减少并均衡网络能量消耗,同时满足源位置隐私保护任务的实时性要求。     

引入虚拟偶像更新产品形象——分析第四代Corsa的推广设计策略

本文讨论了GM于2006年9月推出的新一代Corsa的推广设计策略。2006年,在面临品牌识别困难和财政问题的双重危机下,GM通过重塑Corsa小车,成功的夺回了超级迷你车型市场第一的位置。     

基于信任度评估的社交网络虚假账户检测

在利益驱动下,社交网络中出现大量虚假账户,其发布的虚假消息可对正常用户产生误导。通过对社交网络中大量数据进行分析,发现虚假账户与正常账户在账户特性、行为特性上有较大差异。基于这些差异,结合Rough Set相关理论提出账户信任度的计算模型。所得信任度可用以区分虚假账户,并为正常用户的判断提供依据。实验显示,根据所得信任度对账户排序得到了较好效果,并能够有效区分虚假账户。     

Learning psychotherapy in the digital age.

There is substantial literature documenting the process factors that lead to effective psychotherapy. Similarly, there is now a wealth of data attesting to the effectiveness of several psychotherapy brands. Little is known about the elements that facilitate learning how to be an effective clinician. One important step, after reading about a treatment model and seeing techniques demonstrated, is having the chance to practice the approach and receiving feedback and coaching from an experienced, knowledgeable supervisor. To accomplish this efficiently, most programs rely not only on trainee accounts of what went on in their therapy sessions, but also on recordings and videos of therapeutic encounters. This article describes our experience over a 5-year period in developing the use of Webcams for training psychology interns and psychiatric residents in the delivery of psychotherapy services. Pragmatic and technical details are given about how we went about establishing a recording system that is easy to use and provides secure, confidential storage of information at a reasonable cost. Discussion addresses both the weighing of choices that need to be made and overcoming the hesitation of trainees to reveal their work during treatment sessions. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

食品市场职业打假人权利的法律边界

聚焦食品市场，从职业打假案件的诉讼现状入手，总结分析了目前理论与实务中关于职业打假行为存在的问题与争议，讨论了职业打假人知假买假的权利保护限制必要性，并尝试从多个层面对其职业打假行为进行引导规制，如明确职业打假人的法律地位、引导打假行为正当化规范化等。     

Examining the impact of rich media on consumer willingness to pay in online stores

This research examines the impact of rich media on purchase intentions and willingness to pay in online stores. Via an online experiment, we tested the effects of two rich media presentation formats: product videos and virtual product experience, and compared them with static displays. The results confirm that the rich media displays enhanced the feeling of informedness about the examined products and increased excitement regarding the shopping experience. Virtual product experience had a direct positive effect on consumer purchase intentions, suggesting that virtual product experience-focused tools have the potential to outperform passive videos. Moreover, consumers showed higher willingness to pay values for experience products than for search products when interaction was possible.     

颜色度量因子耦合局部特征聚类的 图像复制-粘贴篡改检测算法

针对当前较多图像复制-粘贴篡改检测算法主要依靠图像的灰度信息来检测图像特征,没有考虑图像的色彩特征,使其存在误检与漏检的不足,引入余弦调制高斯滤波(cosine modulated Gaussian,CMG),设计了基于颜色度量因子与局部特征聚类的图像复制-粘贴篡改检测算法。利用CMG来求取图像的尺度响应值,并通过极值计算来提取图像的候选特征点;再利用像素点的光谱反射模型来建立颜色度量因子,从候选特征点中确定图像的鲁棒特征点。构建特征点的邻域圆,并求取该圆域中的四元数指数矩(quaternion exponent moments,QEM),从而得到相应的特征向量;利用特征向量来计算特征点间的欧氏距离,完成图像的特征匹配。最后,利用匹配点对的R、G、B值,形成特征点的局部特征,实现图像特征的聚类,准确定位复制-粘贴伪造内容。仿真结果显示,较当前的复制-粘贴伪造检测方法而言,对于简单的复制-粘贴篡改和复杂组合篡改,所提方法都具备更高的检测精度与鲁棒性。     

质量评价指标在打击白兰地假冒伪劣中的应用

白兰地成分复杂,可研究的质量评价指标也相对较多。选取了可对白兰地进行有效评价的质量指标进行研究,主要有感官,矿质元素,总酚,单宁,多酚类物质,香气成分,色度、pH等,并围绕白兰地质量进行了分析研究,利用质量评价指标提出鉴别假冒白兰地的初步方案,并应用于打击白兰地假冒伪劣。     

Basic Concepts for Alternating Current through Educational Videos

This article highlights the importance of complementing classes through educational videos, especially in disciplines exclusively with lectures. This proposition is exemplified through basic concepts in alternating current for both single-phase and three-phase circuits, which are critical in the formation of electrical engineers, mechanics, chemists, etc. The main objective of conducting educational videos is to make learning more attractive and stimulate interest in acquiring the knowledge of certain topics, given their importance in professional life in different engineering areas. The videos, filmed in laboratory and of short duration, aim to complement and consolidate the content taught in the classroom lectures.